Portable furnace.



M. DAVIS.

PORTABLE FURNAGB.

` APPLICATION FILED BBPT-1, 1911. 1,008,406.

Paten-ted N0v.14, 1911.

5 SHEETS-B HEBT 1- ATTORNEY.

M. DAVIS. vPORTABLE PURNAUB. ABPLOATION IILED SEPTQI, 1911. 1,008,406 Af Patented Nov. 14, 1911;

` f 5 SHEETS-SHEET 2.

M. DAVIS. PORTABLE fnnmc. AYPLIOATION FILED BEPT. 1, 1911.

Patented Nov. 14, 1911.

\ y 5 BHEETSBHBBT 3.

1N VEN T oR. /Herr/'l/ Da v/,s

WITNESSES.- l l C mA/MM A Y v ATTORNEY.

M. DAVIS. PORTABLE FURNAGE.

APPLICATION FILED SEPT. 1, 1911.

`1,008,406. Ptented Nov. 14, 1911.

s sums-*snm ,4.

WITNESSES f f INVEN TOR.

F'ATTVORNK M. DAVIS.

PORTABLE FURNAGE. APLIGATIox FILED snm. 1, 1011.

Patented Nov. 14, 1911.

s ausm-sum 5.

INVENTOR.

Y Merrill Dar/3 BY MMM ATTORNEY.

UNITED sTATEs PATENT oEEioE.

Mannini. Davis, or Wa'rEn'rowN, NEW Yoan, assxeNoa 'ro Jamas n. wiszi,or

. wA'rEarowN, -Naw Yoan.

Poa'rAnLE FUnNAcE.

Bp'ecmoation o! Letters latent.

Patented Nov. 14. 1911.

To all whom 'it may concern.'

Be it known that I, MERRILL Davis citizen of theUnited States, residingat Watertown, in the county of Jefferson and State of New York, haveinvented certain .new and useful Improvements in Portable Furnaces, ofwhich the following is a specification.

This invention relates to improvements in portable furnaces, designedfor use in meltmg various kinds of metals, the furnace being tiltableand rotatable for pouring the metal directly into the molds'.

The invent-ion relates particularly to improvements in the devices shownand described in m former applications, filed respectively, arch 30,1911,. Serial No. 617,874, and July 13, 1911, Serial No. 638,296.

The object of my invention is to provide a tiltable' androtatablefurnace for melting metal, which may be readil `trans ortedfrom place toplace, and which carries its own heating a cnt.

A further ojectis to provide a furnace which is adapted for pouring themolten metal directly into the molds, without disturbing the fire, orrequiring the rehandling of the metal.

A further object is to provide a plurality of'siinultaneously actuatedhoisting devices for supporting and elevating the fu'rnaoe.

A further objectis to provide adjustable means for varying the axis uponwhich the pouring spout of the furnace rotates, so as to deposit themetal atdifferent points successively,` without disturbing the furnaceor -its operating parts,

A further object is to provide s imple means' for effecting theautomatic raising 'of the pouring spout during the final pouringoperations, for the purpose of feeding the molds. And a' further objectis to provide means capable of manual, and also automat-ic operation,for cont-rolling the hoistin devices.

he various features and parts of my invention will be described in thesubjoined specification, illustrated by the accompany# ing drawings, andthen particularly pointed out inthe appended claims. Figure 1 is a topplan view of the4 device; showing the furnacein erect position' readyfor charging andfiring. Fig. 2 is a front elevation of the. same. Fig'.3 is a right side 'elevation of the 'furnace 1in erect position.

pourin Fig. 4 is a ri ht side elevation; showing the furnace tilte forskimming the metal preparatory to pouring the same into the molds.

1g. 5 1s a similar elevation; showing the furnace in elevated position;also showing the methodv and means for elevating the curing spout duringthe pouring operation.

1g. 6 is a view similar to Fig. 5;\showing furnace in elevated position;also showing the method and means for shifting the pouringspouthorizontally for depositing the metal at different points. Fi 7 isa central longitudinal section throug one of the hoisting devices. Fig.8 is a cross-sectional view of the valve which controls the hoists; thevalve being closed. Fig. 9 is a similar view; showing the valve open.Fig. 10 is a similar view; showing thevalve reversed for exhausting theair pressure from the hoists.

Similar characters of reference are assigned to corresponding partsthroughout the several views.

After devising and putt-ing into practice my former furnaces referred toin t-ie said applications, I found that the provision of a fixed,unvarying point from which the melted metal is to be poured, had theeffect to limit the said furnaces to but a few classes of foundry work,where it is desirableto pour the metal direct from the crucible into themolds, a'nd that one or more .important branches ofthe casting business,as 4it obtains in the rollin -mills, could not be handled by the saidurnaces, principally because of the feature of the fixed point for themet-al.

In ro ling-mill practice, the rods or ingots from whichl wire and tubesare formed, Iare cast in iron'molds which are placed in substantiallyvertical position, and the molten metal is poured into the top ends ofthe molds. These ingots are usually of comparatively small diameter, andquite long, and the melted metal must'be cured into the molds as rapidlyas possib e un til the molds are full. Should the pouring oper-ation besto edl when the molds are full, a

.crust Woul immediately form over the tops, and the rapid shrinking ofthe metal would causel flaws and cracks or initial strains, which wouldrender the in ots unfit for use. This tendency is overcome ya rocesscommonly known as feedin w ich-will be brieiy described: When t e. moldhas been- 25 said adjustment may be effected either bechamber 15. Thegland 1 poured full, the llow of the metal is sudby a common shaft 12,which is journaled ir denly reduced to a stream about the size of a andsupported by suitable bearings 13 formcommon leady pencil, which isallowed to ing parts of the end portions 14 of the truck gravitate intothe top of the mold. At the frame, in such manne rthat the hoists A and5 same time, the oint or spout from which the A may oscillate slightlyduring their operametal is poured) is raised to a greater hei ht, tions.in order to give this small stream sullicient Fig. 7 illustrates theconstruction, arvelocity to continually break through the rangement andoperation of one of the hoistcrust which rapidly forms on the to of theing devices, which will now be described: 10 poured metal. The size ofthis eedin The cylinder 10 telescopically fits over the stream isregulatedby the rate at which 51e plun er 11, there being a clear spaceor metal in the mold shrinks or contracts, and hamer arranged betweenthese arts, when the shrinking and contracting has which is` intended tobe normalll7 fille with ceased, thepouring is stopped. This c0ndi oil'orother suitable liquid for raking and 15 tion and requirement, I havefound, renders steadyingthe cylinder 10 during its reciproa furnace thatpours the metal from a fixed eating movements. A suitable packin 16 ispoint useless for this class 'of rolling-mill disposed within each endof the cylin er 10, work. To this end, I have redesigned the forpreventing the escape of the oil from the furnaces of my former aplications, and chamber 15,. Any suitable means may be 20' have pro'videdmeans where y the pouring employed for compressing and holdingy thevspout may be moved horizontally and also packing 16 in lace, but thelower packing vertically within a certain range, for depos- 16. ispreferabi;r provided with an upper iting the melted metal at differentpoints, as gland 17, which comprises a tubular part, Well as, ,from ahigher level or plane, and the the upper end of which rojects into the7) is'so arranged, i fore', or during-the pouring operations, withthatwhen the cylinder 10 moves upwardly out in any way interfering with thepouring over the plunger 11 the said gland forces of the metal. Theadjusting parts may also the `oil in the chamber 15 through a. port beset,to cause automatic vaction of the pour- 18, into an inner oilchamber 19, which is ing-spout controlling-mechanisms asthe difvformedin the plunger 11. Both ofV the 9 l held in place by any ,suitablemeans. plunger. The tube 20 ferent: periods or stages` ofthe pouringoperchambers 15-and 19 are intended4 to be filled lations are reached,and the degree oi' ran e to their capacity with a heavy oil, the oil ofthe said variations can be instant y being supplied in the first placeby means of changed to 'meet unexpected requirements or a threaded hole1-5.' in the cylinder 1.0,whicli 35 miscalculations. is then closed by ascrewlug 15". Thel 1( The furnace comprises a hollow cylindri plunger 11is -preferably hollow throughout c cal outer body or shell 2, in'whichis disits entire length, and its interior is lined posed a crucible ormelting-pot 3 ,which may with a tube 20, which is preferably fittedfollow theisual construction, and may be liquid tight into the o positeends of the 4rms the inner side 10 4 re resents a curing spout, which isof the oil chamber 19. Below the tube 20, prefera l attached) to the topof the body 2, the opening through the lu'n er is closed at onesi e-ofthe crucible,'in position to reby a plug 21,' which is hel tig tly inplace lceive the contents ofthe 'crucible when the -by a screw 21', thesaid plug having an lipfurnace is tilted. The crucible is preferwardlyprojecting nozzle-like part 22, which 1 11 ably disposed centrall in thebody 2, and is. lis bored out for carrying oil into the interioi'-surrounded'by a com ustion chamber 5, in -of the tube 2O during theoperation of the which an'y suitable fuel, such as gas, oil or hoist.Within the tube 2O is disposed. 'a coke may be placed-and burned forheating piston 23, which .is provided with a pack- 5.o the furnace. gThe fuel may be burned under ing 23', which is compressed between a 115natural or mechanical draft, applied in any gland 24 and a flange 25. 26represents the suitable manner.v piston rod, the lower end of whichconnects The self-contained furnace is litted with to the piston, whilethe upper end is adtrunnions 7 and 7, whichl are preferably justablyconnected to a cap 27, which is vrigidly attached to the op osite -outersides :secured to the upper end of the cylinder 10 120 of the body 2, bymeans o which the entire by bolts 27 The upper end of the rod 26weight-ofA the'furnace is supported. AEach is threaded. for receiving anadjusting-nut of thel trunnions is journaled in bearings 28. 29represfents a tube which surrounds which are formed in like integralperforated the piston rod, its lower end bearing upon l 6o lugs orprojections 9, of the outer movable thev gland 24, the upper end of saidtube in- 125 members 10, of a pair of hoisting cylinders tertting withthe underside of the cap 27. A and A', which reciprocate on inner mem-The arrangement of these parts is such that,

bers or plungers 1'1 of the lioists.l The -when t e nut 28' is screweddown on the rod `plun'gers'll extend below the lower ends of 26, thepiston is ra sed, and owing to the the cylinders 10 and are pivotallysupported presence of th'e tube 29, which bears against 130 plunger 11and at the same time the g and 17 in the ottom of said cylinder movingupwardly in thejchamber 115, msplaces the 011 thereinand forces it throuh the port 18 into the chamber 19. The oil being incompressible, musthave" an outlet from the chamber 19, which is already full ofthe fluid,and for this purpose, I provide a ort 33 at the bottom of said chamber,w iich connects with a pipe 34, which carries the oil to the valve 32.The oil then passes through the valve `32 and returns by Way of a`flexiblepipe 35 and renters the lowerV end of the plunger 11, by way ofaport 36, which extends through the wall of the plunger and into the 'lug21, whereit risesin the nozzle 22. T e" nozzle 22 is disposed in a ihollow part 36 of the piston 23, the outside of the nozzle is formed taering, and the whole of `this part is smaller in diameter than thechamber 36 of the piston, so that the oil flows freely out of the topofthe nozzle, thence ldownwardly into a small chamber 37 disposed belowthe piston 23. v As soon as thecylinder 10 begins to move up-v wardly,thechamber 37 increases in depth, and this space is immediately filledwith the oil which has been displaced from the chambers 15 and 19. Thespace between the plug 21 and the piston 23 which comprises the chamber37 is intended to be exactly proscent of the cylinder 10. The speed atwhich the cylinder 10 may bel raised or lowered is.

regulated by the arca of -one or all of the.l several ports or passagesthrough which the oil must flow in passing to and from the chambers 15and 37. By the use of the oil, as described, the `hoists are always keptunder complete control, and the rate of travel of the cylinders 10 is atall times governed by the rate of flow of the oil.A

The valve 32 which controls the hoists` will now be described.

40. represents .the outer casing or shell of Kthe valve, in which isrigidly `lng 41, which is bored .outtapering telit the tapering plu 42.The said plug is pro-` vided with a cy indrical portion 43, which` -nismof the seed@ bufalis preferably fitted tightly into one end of a hnk 44,the outer end ofthe part 43 then passes loosel through and pivots in theupper end o a lever 45, the said link and lever forming parts of theelevating me chaurnace. The casing 40 is prov1ded with threaded radialports or holes a., b, c and d, into which are screwed pipe s 31,

'ressure and oil to and from lthe valve. The ushing 41 isy provided witha number of longitudinal slots or ports a', 7)', c and cl', each ofwhich communicates at or near one end with the ports of the casing 40.The

casing 40 is provided with a laterally, projecting portion 47, which isbored ott to forni a socket to receive one end of an operating handle orlever 48,`by means of which is manually operated. 49.repre` the casingsents a t readed hub formed on the o ppc# site end of the plug 4.2,which' pierces the center of a four-arm spring'- 50, which is held in.place by a` nut 51. The spring 50 is employed for holding the casing`40operatively 'engaged with plug 42.

The operation of the valve 32 is as fol- 34, 35 and 46, employed forconducting,I air lows: Air (pressure from any suitable source f issupplie to the valve through pipe 46. When the valve parts are in thepos `lt-ion shown in Fig. 8, no air or oil can pass through the valve.When the operator pulls downwardly on the hand-lever "48, the'cas-` ing40 will be rotated to the left, frorr. the

osition shown in Fig. 8, to that shown in ig. 9, which will bringV theports a `ard into 'communication with curved passage f of the plug 42,which will allow the air pressure to flow from the vpipe 46 into thepipe 31, to be carried by the latter to the hoisting cylinder A. At` thesame-time the air ports are opened, as described, the ports vard d onthe opposite side'oi the casing 40g are brought into communication" withar; irregularly formed by-pass L. in the plug 42, which allows the oilentering the valve through the pipe 34 to pass into thc pipe 35telescoping parts 10 and 11. To exhaust the air, Lthe operator shouldswing` the lever 48 to the right suliciently to shift the casing 40 tothe position shown in Fig. 10, which llO will close the curved passage fof the plug, and bring the port. b' into communication with a radialpassage 1', which connects with a central port k, whichcommunicates withthe 'atmosphere4 through the center of the threaded hub 49. lrVhen theparts `are brought into the last position, the air pressure confined inthe cylinders 10 of hoists A and A will escape to the atmosphere throughthe port 7c. At the same time the casing 40 is rotated for exhaust" theair, the o1l ports c and d' will be brought into communication with theby-pass h of the plug 42, which will allow the free passa of the oilfrom the chamber 37 of the hoist through pipe 35 into the said b pass,thence returning to the chamber 15, y way of the pipe 34, chamber 19 andthe port 18. As the air is exhausted, the hoists A and A' will closedown gradually, the closing movement, like the opening movement beinglated by the rate of ilow of the oil, as 5escribed. In order to providefor the simultaneous circulation of the oil from the valve 32 to both ofthe hoists, the ipes 31, 34 and 35 are each provided withs 52, towhichare connected branch pipes 31', 34' and 35'; all of the latter p hoistA' in exact y the same manner as is shown for the hoist A.

The truck frame com rises thee'nd rails r parts 14, and the si e rails14', which may be joined together in any suitable manner.A The truck isprovided with four wheels or rollers 53, which are journaled on Vshortgud eons of pins 53', which are embedded 1n t e side rails -14 of theframe. The truckpreferably travels on track-rails 54.

The mechanism for` A'elevating and co-- trolling the furnace consists ofthe following parts: 55 represents rearwardl projecting perforated lugscarried by cylinders 10 of the hoists, which are preferably locatedopposite the lugs'9, to which are pivotally connected downwardlyextending levers 56, by means of pins 56'. The lower ends of the levers56 are pivotally connected to like side levers 57, by pins 57. Theforward ends of the levers 57 are pivotally attached to upwardlyextending portions of the frame 14-14' by means of a common shaft `58,which extends across the/ front of VSaid frame.

When the furnace is tilted from the posi.- tion shown in Figs. 1, 2 and3 to that shown in Fig. 4, and also during its elevation for pouring themetal, the top ofthe furnace leo -by pins 61', the lower ends ofthe-levers 61 is supported by two three-arm levers 59, disposed one oneach side of the body 2. One arm 59' of the said lever is pivotedto thetrunnions 7 and 7. The forward arms 60 are pivoted tothe upper ends oflevers -61,

being pivotally connected to the side leversk i 57 by means of a shaft62,so that the levers ipes connecting with the respondin -f'parallel reation.

-61' are adapted to move -iipwardly and downwardly with the levers 57.

63 represents the short-upper arms ofthe levers 59, which are slotted at63' to receive pins 64 and 64', which are made fast to the oppositesides of the body 2, and which slide back and forth vin the saidv slotswhile the furnace is tilted or rocked on thetrunnions threaded to bescrewed onto the pin 64. The, object of this threaded connection is toprovide means for locking the furnace body'2 in an desiredy positionwithin the ran e or lengt of the vslots in the levers 59.

and'firing" osition shown 1n Fi 1, 2 an '3, the han -wheel '65 may betightened to holdV the body rigid in said position, and when the furnaceis tilted to the position shown in Fig.- 4, the hand-wheel may again betightened for new position. The links 44 one of which is connected tothe valve 32 and levers 45, extend rearwardly and pivotally connecttothe levers 61 intermediate their ends, by pins 44'. The distance fromthe centers of the pivots of the links 44 is intended to be the same asthe distance from `the center of the shaft 58 to the center of the shaft62, which connects the 'levers 61 to the levers 57 so that when thesaidV partsbare operated during the elevation and lowering of thefurnace, the corparts are held and moved in In practice, the molds `intowhich the metal isto be poured are generally so arrangedthat theirpouring vents or sprues come in line alongside and parallel to thetracks 54 on which the furnace is moved from place to place. -Itfrequently happens, however, that some of the sprues are of smallerdiameter, and for other reasons, it is impossible to locate all of themolds so that the centers of all of the sprues will be in line parallelto thesaid tracks, and as the stream of molten metal must flow into .thecenters of the molds, it is obvious that means must be provided foradjusting the point -of the pouring spout 4 to suit the differentlylocated sprues. To this end, I have provided an adjustable mechanism,which vcomprises the following parts: 66 represents' vertically disposedlevers pivotally supported .by a common shaft 67, which is journaled inthe frame parts 14. The lower ends of-levers 66 connect with the lowerends of the levers 45 through rods or links 68, by pins 69 and 69'. 70represents a screw-threaded rod, the outer end of which carries ahand-wheel 70', the inner end thereof being screwed intoa yoke 71,

en -the furnace is in the upright, -or chargin holding the furnacefinthev 59 and the furnace body 2, inthe manner dotted lines in Fig. 6. Thelower ends of,

i lateral movement will be imparted 'to the top ends o'f the levers 61,to which are pivot- `this way" the furnace body may be swung and thespout 4 will at the same' time be `the other movable parts of thefurnace durllinks 44 and the levers 57. The operation greater or lessdistance -above the top of which is pivoted to one of the upright levers66. The y turning of the hand-wheel 70 in the opposite directions, rocksthelevers 66l correspondingly, and through the links 68 swin the leverson the shaft 58, and there y corres ondingl swings the tops of thelevers 61, t rou h t e links 44, from the` position shown in l lines, tovthe position shown in dotted lines, in Fig. 6. The adjusting of thelevers 61, as described, also effects the shifting horizontally of thelevers and to the extent shown by the full and the levers 61 arejournaled -or pivoted to the levers 57, but they are notinuenced by theadjustment effected by the operation of the hand-wheel 70', therefore,an increased ally attached the forward arms of the levers 59, whichsupport the top of the furnace body 2, and control the pouring spout 4.In

forward or `backward from the positions shown in full and dotted linesin Fig. 6,

correspondingly shifted in a horizontal direction. This horizontaladjust-ment will not affect the pouring spout in relation` to ing thepouring operations, and it may be done while the pouring is takingplace. The latter `result is due to the fact that each of the levers 61-must and will at all times travel or rotate on an axis havingthe sameradius as that which is controlled by the of the hand-'wheel 70effectsthe changing of the axis of the pouring spout horizonf tally,while the releasing of the hand-wheel permits the furnace body 2 to be.tilted and set atany angle within the range or length of the slot-s 63',which will change the radius from that of the levers 59 and 61, whichwill permit the spout 4 to move vertically during the elevating andpouring operations.

y The operation of the furnace" is as follows When the metal to bepoured has been sufficiently heated, the furnace is trundled overthetracks 54, toa position opposite the mold 72, and then the body 2 ofthe furnace is tilted, `preferably by hand; `into the position shown inFig. 4. The metal is then skimmed in the usual manner and is ready forpouring. In case the point ofthe pouring spout does not come in theright position in relation to the sprue of the mold, the furnace maybeadjusted horizontally by the operation of the hand-wheel as explained.If the spout 4 is required to be elevated for positioning Jthe same at athe mold, this may be yaccomplishedby releasing the hand-wheel 65, byunscrewing the same on the'pin 64.- T he top of the .firnace may beslightly elevated or lowered, by moving the pins 64 and 64"toward oraway from the forward ends of the slots 63', as indicated by the dottedlines in Fig.'

5. Then by tightenn up the hand-wheel 65,. the furnace when e evatedfrom; the po sition shown in Fig. 4 to that shown in Fig. .5, will pourthe metal from the desiredlev e1. soon as the pouring spout is adjustedto `properly pour themetal into the mold, the operator should grasp thehand-lever 48 attached to thev'alve 32, and move it ':o I

wardthe left, ort; downwardly (see Figs. 5, 6 and' 9) 1n agradualmanner. This will cause the rotation of the Valve casing 40,`from 4the position shown in Fig. 8, to that shown in Fig. 9, which willestablish coinmunication between the pipes 46 andthe pipes 31 and 31',and allow the compressed sto air to flow simultaneously into thecylinders f 10` of the hoists A and A. At the same time, ,the oil portsc-c and d-d andthe by-pass hof the valve will be opened for the freepassage of the oil from the pipes 34 -34 to the pipes 35-.35. The airexerting its pressure against the tops of the cylinders 10 of thehoists, will force said cyl- A inders upwardly, while the plungers11.wlll be held stationary by the shaft 12. The upwardmovement of thecylinders 10, through the connections by means of the lugs 9 with thetrunnions 7 and 7 will lift the furnaze from the position shown in Fig.4 to th it shown in Figs. 5 vand 6, and during this upward'or rotarymovement of the furnace and its related parts, the molten metal willflow from the c rucible 3 and gravitate in'o the mold 72. The upwardmovement of the cylinders 10, through the lugs 55 andthe levers v56e'ects the upward movement of,y

the rear ends of the side levers 57, which .in turn lift the angularlevers 61, to which are connected the forward arms of the levers 59,which are journaled lto the trunnions 7 and 7 travel in like arcs whichare fixed by the links 44, owing to their pivotal connections with thelevers 45. The levers 59 thus form members of what is commonly known asa parallel motion, onaccount of the radiuscf the links 44, and thedistance between the centers 58 and 62 being the same, by which thelevers 59 describe the same arcs. The upwardly projecting ends of thelevers 61 connecting with the forward arms of the The levers 61 areforcedto` lever's59, are "so disposed' as to travel` in f arcs, the axesof which would normall v` pass through the tip of the pouring spout 4.The continuation ofthe upward `movement.

of the cylinders l0 of the hoists will cause all of the levers just'described to travel iii f.

ares relative tothe poi'nt of the pouring spout, whether the point isabsolutelyfxed or not. If,l at anytime during the pour: ing operation,it is desired to increase the fheight from which the melted metal is to'relatively to the top wheel 65may be loosened b be poured from the ointof the spout 4 o? the mold, the handunscrewing it on the stud or pin 64,and t e furnace may then be rocked backwardly or forwardly, as the casemay be, on the trunnions 7 and 7 during which movement, the ins 64 and64 will travel in `the slots 63" o the levers 59. Then b screwing thehand-wheel tight 9 to that shown in Fig. 10, whichr will allow vthe airpressure contained in the two hoists to exhaust through the ports and clocated in the plug.42. As soon as the air is exhausted, the weight ofthe different parts, including the object hoisted, as the furnace, willforce the cylinders 10 downwardly over the plungers 11 to the closedposition shown in Figs. l, 2, 3,v 4,'and also as shown b the full llinesin Fig. 7. When the mol has been filled, and the operation known asfeeding is commenced, the point of the .pouring spout 4 is raised in agradual manner a suitable `distance by the following means: In the firstplace, the furnace bod 2 is released from the locked contact througlithe pins 64 and 64', and the hand-wheel 65. with the levers 59, byunscrewing the said wheel, as explained. The furnace ma then be swung onthe trunnions7 and 7 to a ynew position, as for example, from theposition shown in full, to the osition shown in dotted lines, in Fig. 5,Vw ich shows the point of the spout 4 in a slightly elevated position.As ,the furnace is elevated for pouring the metal, the point of theyspout 4 will gradually rise in a true vertical line, and the meltedmetal will fall into the mold from an increasing height -withV greaterforce, which is desirable during the feeding operation. The increasedforce of the gravitating metal will .break through the i Vcrust whichinvariably forms on t-he top` of .top end of the ingot or casting `willthe metal which has been poured, as soon as the casting begins to cooland shrink. Unless thiscrust is kept broken u .the

1mperfect, and unless the so-called feeding operation is carried outuntil the mold is entirely full, the ingot will be imperfectly.

formed, due to checks and flaws and initial strain, which will render itunfit for use. Theadjusting of the furnace by means of the pins 64andk64 and the slots63, as explained, will cause the point of thepouring spout, when the furnace is afterward rotated, to move away fromthe axls or center of the arc described b the tops of the levers 61,which control t e levers 59, and will effect the movement ofthe point ofthe'spout in an arc around .the said axis as a center, and the radius ofthis arc will be the distance that the spout has been moved from theaxis of the levers 61. This feature is of great advantage, as whenpouring molds of known capaclty, this, distance may be regulated andfixed so that when the molds have been filled and the feeding operationis begun, the point ofthe pouring spout will be automatically raised tothe desired height without further attention or.

adjustment by the operator. The'subsequentrrotation of the furnace onthe trunnions 7 and 7 will not affect or change the axis or point ofoscillation last described, which will remain in a position governed bythe disposition of the levers 61, which in turn are controlled by'links44, and the shafts 58 and 62 on levers 57.

73 represents a spring, which connects at one end. b'y vmeans of screws75 to the valve casing 40, the opposite end being disposed looselbetween plns 74 carried by the link 44. hen the casing 40 of the valveis rotated in either direction, the spring 73 is bent (see Figs..9 and10) and exertsits tension for rotating the casing in the oppositedirection from which the operator moved it. The object of the spring 73is to prevent the air pressure from continuing to operatethe hoists, incase the operator, for any reason, lets go the handle 48, after he hasonce opened the valve.

.When the valve has been opened by the operator, the airpressure'actuates the cylinders 10 ofthe hoists, and these through `thelevers 56, 57 and 61 will lift the link 44,

which is rigidly connected to the plug 42, which rotates with the saidlink. In case the operator opens the valve part way, by means of thehandle 48 and thenholds the `handle still, after a few seconds time, the

link 44 will have moved upwardly with the lever 61, and will rotate theplug of theA valve in the same direction in which the operator turnedthe casing 40, which will close the valve. In order to prolong thehoisting operation of the hoists, the *operator must continue to Slowlyswing the handle 48 and thus keep time with the rotation of the plug 42and the link 44, otherwise, the

link will close the valve and shut off theair pressure, which will stopthe elevating of the furnace.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent, is-

1. In combination, a tiltable and rotatable furnace mounted ontrunnion's, a pair of fluid pressure actuated hoists for supporting andoperating the furnace, i an elevating mechanism for rotating the furnacedurin the pouring operations, and a valve carried by parts of saidelevating mechanism adapted to control said hoists.

\ 2. In combination, a-pair of Huid pres-y -sure actuated. hoists, arotatable furnace having triinnions journaled to said hoists,

`means for rocking the furnace on the trun mons, a valve forcontrollingsaid hoists, an l elevating mechanism cooperating with saidhoists for rotating the` furnace after the same has been rocked on thetrunnions, the

said mechanism supporting said valve, andadapted to automatically closethe valve whenever the operator is inattentive.'

3.` In combination, a ,rotatable furnace `mounted on trunnions, a pairof fluid pressure actuated hoists for supporting and rota-ting saidfurnace, a valve fori controlling said hoists, ymeans for operating saidvalve for effecting the hoisting of said furnace, and means actuated bysaid hoistsfor automatically closing said valve.

4j. In combination, aiy furnace mounted on trunnions and `having apouring spout, means for tilting said furnace for'bringing the pouringspoutinto pouring pos1tion, locking means for holding' said furnace inyposition for pouring the metal -at a fixed point, and adjustable meansfor effecting the pouring of the metal `from different points.

5. yIn combinat1on,a furnace mounted on trunnions and provided with apouring spout, a pair of power hoists for supporting and operating' saidfurnace, a valve for controlling said hoists, a mechanism for tiltingsaid furnace around an axis passingtransversely through the point o thepouring spout, and: means for adjusting said furnace for depositing themelted metal at different points. 1

6. In combination, a furnace mounted on ,trunnions .and provided withapouring spout and an' adjustable `pouring centen-pins carried by thefurnace in line vertically with the trunnions, levers journaled "tothe'trunnfionshaving slottedv arms to receive said pins, and `means forrocking the furnace on the trunnions to move pinsalong' said slots, foradjusting the pouring yspout'for pouring rmetal from different levelsyfor feedin fthe molds. i n

7, A urnace structure comprising a fur.-

,nace body mounted on trunnions, said 'furnacey body lprovided with apouringspout, and with pmsjin line parallel ywith atl-ansverse axisvpassin through the oint of `the` evers yjourna edy to said` pouring sout, v trunnions aving slots 1n wh[1ch said pins are adapted toreciprocate when the furnace body isi` rocked on` said trunnions, a

hand-wheel #for locking the furnace body in a number of positions forpouring thefmetal i feeding the "molds praxis, and a.mechan1sm actuated"hoists: adapted for normally holding, the

` move upwardly away from the mold, for

pouring the metal from a copstantl chan ing level during the feeding oft e mol 9. In combination, a furnace body mounted on trunnions, saidfurnace body having a pouring spout, and having pins in line verticallywith said trunnions, said furnace i body capable of being rocked on thetrunnions' for bringing the pouring spout over a mold, levers journaledto said trunni )ns having arms provided `with slots` `for eng ag f ingsaid pins, a hand-wheel`carried by one of said pins for lockingthefurnaoe body in different positions `when rocked, and a pair of fluidpressure actuatedhoists journaled on said trunnons adapted foi-tiltingthe furnace body upon said pms.

10.. In combination, a furnace mounted on trunnions` and rovlded with apouring spout, pins carried by the furnace', levers journaled to thetrunnions having slotted arms to receive said pins, means for` rock ingthe furnace on the trunnionsf to move said ins along the slots ofsaidlevers for adjusting the pouring s out for pourl the metal fromldifferent .evels for fee irg.

the molds, anda pairof iuid pressure at tuy v ated` hoists journaled tosald trunnions,

adapted to elevate and rotate said furnace i on said pins.`

11'.: In combination, a furnace mounted on ,trunnions having a pouringspout` and a pour' j axis'on aline passing transverselyy throng thepoint of the pouring spout-,clef

vatinlg* means 'for tilting the said furnace i around thepouring,axis,'and ymeans for 1d-v justing and` setting the curing spout forpouring the metal from different levels for 12. In combinat1on,a c edontrunnions having a pouring spout andy a pouring `airis on a linepassmg'transvers ely miV furnace body mountl:

through the pouring spout,elevating me ans 120 comprising a pair offluid ressure ho ists journaled to saldtrlmnions a apted for tilt- V-urin y sal mg the furnace body around the pouring spout `on the pouringaxis.V

13..In combination,a furnace body mou nted on trunnionslhaving apom-ing:Spqut.` und.j c l 4 a .pouring axis' a line pass'mgtransinversely through they point' of thepourlng 130 spout, elevatingmeans` comprisin ampair of fluid pressure actuated hoists Journaled tosaid trunnions adapted for tilting the furnace body 'around ythe pouringaxis, a

mechanism actuated by said hoists adaptedV Y eratin said furnace, meansor braking and steadying said hoists and. said furnace for preventingintermittent movements of said parts, a mechanism connected with andactuated by said hoists, adapted toA coperatie with said hoists forelevating and rotating said furnace for pouringmetal directl into amold, a valve carried by arts o said mechanism adapted to contro saidhoists, and means for automaticall closing the said valve whentheoperator or inattentive.

15. In combination, a furnace mounted on trunnions and .provided with apouring spout, a liuid ypressure actuated -hoist journaled to each ofsaid trunnions for supporting said furnace, a truck* frame `havingwheels vfor rendering said furnace portable, a shaft carried by saidframeffor lsupporting said hoists,- means for operating said hoistssimultaneously forl elevating said furnace for ouring the metal directlyinto the mol s, vand means for adjustin the furnace for de siting themetal at di erent points.

16. n combination, afurnace body mounted on trunnions having'a pouringspout and a pouring axis on a line ,passing trans-y versely through thepoint of the pouring s out, elevating means comprising a pair of uidpressure hoists journaled to the trun-l nions adapted for tilting thefurnace body around the pouring axis, a mechanism actuated lby saidhoists adapted for normally holding the pouring snout on the pouringaxis, and means vfor adjusting parts of sai mechanism for varying thepouring axis.

17. In combination, a furnace mounted on trunnions and provided with apouring spout, a fluid pressure actuated hoist journaled to each of thetrunnions and provided with' means for preventin intermittent movementthereof, pins carried bythe top of the furnace, levers journaled to thetrunnions and provided with slotted arms adapted to receive said pins,means for tilting said furnace on the trunnions a distance equal to thetravel of said pins in said slots for bringing the pouring spout over amold, and means carried by one of said ins for locking the 'furnace m anumber o positions intermediate the ends of said slots for e'ect` ingthevpoui'i `of the metal from diiferent mes careless 18. In combination,a self-contained fur.- nace, a pair of hoisting cylinders for supportingthe furnace, a truck-frame for supporting said cylinders,trunnionscarried by the furnace for pivotally connectingthe fur thelfurnace body for pouring metaldirectlyI into a mold, a mechanismactuated by and coperating with said cylinders for rotating the furnacearound an axis passing transversely through the point o the pouringspout, and a series of links and levers capable of being adj usted forlsuccessively changing the axis around which .the furnace rotates.

20. Iny combination, altiltable orrotatable furnace body having a curingspout, a pair o'f hoists for supporting the weight of the furnace bodyand for rotating the furnace for pouring metal directly into a mold, amechanism actuated by and coperating with said hoists for rotating thefurnace around an axis passing transversely throufgh the vpointof thepouring spout, means or adjusting partsk of said mechanism for shiftingthe axis of the pouring spout for depositing the metal at di'erentpoints, -and means for -chan'gin the radifis of the pouring spout, for eecting the pouring of the metal from di'erent points vertically.

21. In combination, a rotatable furnace mounted on trunnions andprovidedy with a youi-ing spout, a pair of fluid ressure hoistsJournaled tothe trunnions a apted to su port the wei ht of the furnaceand to tilt the furnace or pouring metal directly into molds, levers'ournaled tothe ktrunnions and provided wit slotted arms, said leversadapted to control theV arc through which the uring spout rotates, pinscarried by the rnace normally positioned in the slots of said leversadapted to support the top of the furnace durin the pouring o erations,and means fora Justing and oc ng said pins in different ositions in saidslots for cha the ra 'us ofthe arc throu hr whic t e pouringtsouttravels while t e I furnaceisbeing ti or elevated.

22. In combination, a furnace mounted on trunnions and (provided with apouring justable pouring center, a

out and an ya n uid yactuated hoist journaled on each of said trunnions,pins by the top ofthe furnace, levers 'j'urnaled to the mechanism ahoists for rotating the furnace on the' trimtrunnions and provided withslots adaptedr to receive said pins, means for tilting the furnace onthe trunnions a distance to thetravel of the pins in the j slots forbringing the tpouring spout over a mold, a

apted to coperate" with said nions and also on said pins, said mechanismarranged to normally hold'the pouring spout at a fixed ointhorizontally, and means conn nected wit said mechanism for shifting andholding the pouring spout at different points horizontally. i f I 23. Incombination, a furnace mounted on .trunnions and having a pouring spout,a

pair of fluid pressure actuatedhoists journaled to the trunnions forsupporting the weight of the furnace and for tilting the mechanismconnecting with the said holsts and also with said levers, the said@mechanism actuated by said hoists, andy adapted to fix and controltheaxis `around n which the furnace is tilted, and meansriorr adjustingparts of said mechanism for elevatlng the pouring spout during the pouririg operations. In testimon whereof I aix p in presence o two witnesses.

Witnesses:

P. Non'mN, Crus. A. DUNHAM.

MERRILL DAVIS.

my signatt re

